package day03;

public class IfElseDemo {
    public static void main(String[] args) {
        //满500打8折，不满500打9折：
        double price = 420.0;
        if (price>=500){
            price *=0.8;
        }else{
            price *=0.9;
        }
        System.out.println("最终消费金额为："+price+"元");



        //判断成绩合法还是不合法：
        int score = 120;
        if (score>=0 && score<=100){
            System.out.println(score+"是合法成绩");
        }else {
            System.out.println(score+"是不合法成绩");

        }
    }

}
